The Internet Protocol Journal (IPJ) is published quarterly by Cisco
Systems. The journal is not intended to promote any specific products
or services, but rather is intended to serve as an informational and
educational resource for engineering professionals involved in the
design, development, and operation of public and private internets
and intranets. The journal carries tutorial articles ("What is...?"), as
well as implementation/operation articles ("How to..."). It provides
readers with technology and standardization updates for all levels of
the protocol stack and serves as a forum for discussion of all aspects
of internetworking.

In addition to feature-length articles, IPJ will contain standardization
updates, overviews of leading and bleeding-edge technologies, book
reviews, announcements, opinion columns, and letters to the Editor.

Cisco will pay a stipend of US$1000 for published, feature-length
articles. Author guidelines are available from Ole Jacobsen, the
Editor and Publisher of IPJ, reachable via e-mail at
ole@cisco.com

This publication is distributed on an "as-is" basis, without warranty of any kind either express
or implied, including but not limited to the implied warranties of merchantability, fitness for a
particular purpose, or non-infringement. This publication could contain technical inaccuracies
or typographical errors. Later issues may modify or update information provided in this issue.
Neither the publisher nor any contributor shall have any liability to any person for any loss or
damage caused directly or indirectly by the information contained herein.

Cisco, Cisco Systems, and the Cisco Systems logo are registered trademarks of Cisco Systems, Inc. in the USA and certain
other countries. All other trademarks mentioned in this document are the property of their respective owners.